MongoHealthIndicator not compliant with Mongo stable API with strict setting

[jorgelc]

MongoHealthIndicator uses isMaster command, which is not part of Mongo's stable API https://www.mongodb.com/docs/v5.0/reference/stable-api-changelog/

If the underlying Mongo connection is configured to use the stable API and strict setting, the health indicator yields an error, as Mongo rejects the isMaster command.

Affected versions: Tested with sprinboot 3.3.0, potentially since 3.0.0

To reproduce it, create a blank springboot project including spring-boot-starter-data-mongodb, spring-boot-starter-web and spring-boot-starter-actuator dependencies. Then, set up both Mongo stable API version and strict to true by creating the following bean:

	@Bean
	public MongoClientSettings mongoClientSettings() {
		return MongoClientSettings.builder()
			.applicationName("testApp")
			.serverApi(ServerApi.builder()
				.strict(true)
				.version(ServerApiVersion.V1)
				.build())
			.build();
	}

For reference, such project has been created here https://github.com/jorgelc/mongo-stable-api-springboot-health, with steps about how to reproduced the error and compare the behaviour with when strict is set to false.

[wilkinsona]

Thank you. I've reproduced the problem.

I think we should switch to the hello command. It's supported in MongoDB 5.0 and later and Mongo 4.x reached end of life in February 2024.

[jorgelc]

Thanks @wilkinsona

We implemented that as a temporary workaround locally and it worked for us, but it would be nice to have that supported out of the box.

[jyemin]

Just FYI, the hello command was backported all the way to MongoDB 3.6, so this should be a safe change even for EOL'd MongoDB releases.

[pkunk]

FYI: This is not compatible with Azure Cosmos MongoDB API:
https://learn.microsoft.com/en-us/azure/cosmos-db/mongodb/feature-support-60#database-commands